Periodical Numbers

combinatorics, dp, number theory

Cowboys

combinatorics, dp, math

Little Elephant and Retro Strings

dp

Representative Sampling

dp, sortings, strings

Plane of Tanks: Duel

brute force, dp, math, probabilities

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

Lucky Subsequence

combinatorics, dp, math

Help Caretaker

brute force, dp

Clearing Up

constructive algorithms, dp, dsu, graphs

Constants in the language of Shakespeare

constructive algorithms, dp, greedy

Fibonacci Sums

dp, math

Brackets

combinatorics, dp, greedy

Linear Kingdom Races

data structures, dp

Petya and Coloring

combinatorics, dp

Petya and Spiders

bitmasks, dp, dsu

Crime Management

dp, graphs, matrices

Arrangement

bitmasks, dp

Castle

dp, greedy, probabilities, sortings, trees

Widget Library

dp, expression parsing, graphs, implementation

Beautiful Road

dfs and similar, dp, dsu, graphs, implementation, sortings, trees

Numbers

dp, math, number theory

Domino Carpet

dp, implementation

Beavermuncher-0xFF

dfs and similar, dp, dsu, greedy, trees

Tourist

binary search, data structures, dp

Nuclear Fusion

bitmasks, dp

Expression

dp

Changing a String

dp

Writing a Song

brute force, dp, strings

Bombing

binary search, dp, probabilities

Common ancestor

dp

Ivan the Fool VS Gorynych the Dragon

dp, games, graphs

School

dp, dsu

Moon Craters

dp, sortings

The Great Marathon

dp

Smart Boy

dp, games, strings

Lesson Timetable

combinatorics, dp, math

TV Game

dp

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Bath Queue

combinatorics, dp, probabilities

Broken robot

dp, math, probabilities

Sequence

dp, sortings

A Simple Task

bitmasks, dp, graphs